LONDON-IOS/GME Remit/Utilities/CustomUI/CheckBox/CheckBox.swift

//
//  CheckBox.swift
//  GME Remit
//
//  Created by InKwon James Kim on 2020/01/02.
//  Copyright © 2020 Gobal Money Express Co. Ltd. All rights reserved.
//

import UIKit
import RxSwift
import RxCocoa

@objc protocol CheckBoxDelegate: class {
  func checkBox(_ checkBox: CheckBox, isSelected: Bool)
}

@IBDesignable
public class CheckBox: UIView {
  private let xibName = "CheckBox"
  
  weak var delegate: CheckBoxDelegate?
  
  @IBOutlet private weak var checkMark: CheckMark!
  @IBOutlet private weak var button: UIButton!
  
  var isSelected: Bool = false {
    didSet {
      if isSelected {
        checkMark.animate(animationType: .check)
      } else {
        checkMark.animate(animationType: .remove)
      }
      delegate?.checkBox(self, isSelected: isSelected)
    }
  }
  
  @IBInspectable
  var borderWidth: CGFloat = 1 {
    didSet {
      update()
    }
  }
  
  @IBInspectable
  var borderColor: UIColor = .themeText {
    didSet {
      update()
    }
  }
  
  @IBInspectable
  var cornerRadius: CGFloat = 5 {
    didSet {
      update()
    }
  }
  
  override init(frame: CGRect) {
    super.init(frame: frame)
    commonInit()
  }
  
  required init?(coder: NSCoder) {
    super.init(coder: coder)
    commonInit()
  }
  
  override public func prepareForInterfaceBuilder() {
    update()
  }
  
  override public func awakeFromNib() {
    update()
  }
  
  private func commonInit() {
    guard let view = Bundle.main.loadNibNamed(
      xibName,
      owner: self,
      options: nil
    )?.first as? UIView else { return }
    
    view.frame = self.bounds
    
    view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
    self.addSubview(view)
    
    checkMark.strokeWidth = 2
    update()
  }
  
  @IBAction private func touchCheck(_ sender: UIButton) {
    isSelected = !isSelected
  }
  
  private func update() {
    layer.cornerRadius = cornerRadius
    layer.borderWidth = borderWidth
    layer.borderColor = borderColor.cgColor
  }
}